Add to ORKGThis bachelor thesis deals with the topic of virtual currencies based on the blockchain technology. The foundations of the cryptocurrency workings are explained on cryptocurrency Bitcoin, which is later described in a greater detail from technological point of view. In addition to the general workings of a bitcoin network, this thesis describes creation of bitcoin addresses, the composition of transactions and the way they are sign and verified. A broader view of cryptocurrencies is offered within the fourth chapter, with the classification into generations and explanation of terms coin, token and stable coin. Chapter Ethereum explains the meaning of smart contracts and decentralized applications. Within the thesis a laboratory task was per...